Fix service_type of mistral endpoint

Change-Id: Idddc6916e41216fe8fd576d9db400a03728e79f8
Closes-bug: #1610968

ansible/roles/mistral/tasks/register.yml

@@ -3,8 +3,8 @@
   command: docker exec -t kolla_toolbox /usr/bin/ansible localhost
     -m kolla_keystone_service
     -a "service_name=mistral
-        service_type=application_catalog
-        description='Openstack Application Catalog'
+        service_type=workflowv2
+        description='Openstack Workflow'
         endpoint_region={{ openstack_region_name }}
         url='{{ item.url }}'
         interface='{{ item.interface }}'

releasenotes/notes/mistral-fix-wrong-service-type-72ff772fc7cf0b82.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - The wrong service type of the Mistral keystone endpoint was fixed.
+    Prior to a upgrade manually change the service type of an existing
+    Mistral keystone endpoint from 'application_catalog' to 'workflowv2'.